updated transcript_display_xref_sources and added gene_display_xref_sources

misc-scripts/xref_mapping/XrefMapper/saccharomyces_cerevisiae.pm

@@ -40,12 +40,23 @@ sub build_display_xrefs {
 
 }
 
+sub gene_display_xref_sources {
+    my $self     = shift;
+
+    my @list = qw(
+                SGD_GENE
+               );
+    
+    my %ignore;
+     
+    return [\@list,\%ignore];
+}
+
 
 sub transcript_display_xref_sources {
     my $self     = shift;
 
     my @list = qw(
-                SGD_GENE
                 SGD_TRANSCRIPT
                );